crushing on a straight girl

i know. it's a cliche. i knew i shouldn't have. but i couldn't help it, i couldn't stop following her around, and now i can't get her out of my head. there's a song i love by my favorite artist and every time it plays i think about her. i miss her when she's not around. i love how close we've gotten and how easy it is to be me around her. i could practically beg to be apart of her life now. i think i would do anything for her. and she has left me wanting.help. how do you get out of this?